Design & Product Development Flashcards

An engineer wants a CAD model where changing the overall length automatically updates hole positions and fillet sizes. Which modeling approach best supports this?

Answer: Parametric, feature-based modeling

Parametric modeling links features through dimensions and constraints so changes propagate automatically.

Which document lists every part, subassembly, and quantity needed to build a product?

Answer: Bill of Materials (BOM)

The BOM is the structured list of components and quantities required to manufacture an assembly.

A team performs Design for Assembly (DFA) analysis. Which change most directly supports DFA goals?

Answer: Reducing part count by combining components

DFA aims to minimize parts and simplify handling and insertion, so consolidating parts is a primary strategy.

In GD&T, what does a datum reference frame establish?

Answer: A coordinate system from which features are located and measured

Datums A, B, and C create a reference frame that constrains the part for measurement and inspection.

Which product development stage typically uses a low-fidelity prototype to test form and basic ergonomics quickly?

Answer: Concept development

Early concept prototypes are cheap, fast models used to evaluate form, fit, and user interaction before detailed design.

What is the main purpose of an Engineering Change Order (ECO) in a PLM system?

Answer: To formally document, review, and approve a design change

An ECO controls revisions by capturing what changes, why, its impact, and the required approvals.

A designer applies a 1-2 degree taper to vertical walls of an injection-molded part. What is this feature called and why is it used?

Answer: Draft angle, to allow the part to release from the mold

Draft lets the molded part eject cleanly without dragging or sticking to the mold walls.